FIELD: oil and gas industry, namely drill pipes for well boring, particularly of readily-alloyable material.
SUBSTANCE: boring pipe has fixed protector inseparably connected to pipe body. Protector has two parts spaced one from another along pipe axis so that cavity is formed in-between. Cavity is defined by parts surfaces directed one to another. Protector is arranged inside cavity so that axial displacement thereof may be restricted. Thickness of wall part located under cavity is equal or more than pipe wall thickness.
EFFECT: increased reliability and service life of drill pipe.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DETACHABLE PROTECTOR FOR DRILLING PIPE | 2003 |
|
RU2244799C1 |
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|
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RU2245479C1 |
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|
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RU2236544C1 |
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RU2215119C2 |
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|
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| PIPE THREADED JOINT OF IMPROVED TIGHTNESS | 2003 |
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|
RU2300692C1 |
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|
RU2244195C2 |
